A player of current prominence (5)
I believe the answer is:
actor
'a player' is the definition.
('actor' can be a synonym of 'player')
'current prominence' is the wordplay.
'current' becomes 'ac' (alternating current).
'prominence' becomes 'tor' (I've seen this in another clue).
'ac'+'tor'='ACTOR'
'of' is the link.
(Other definitions for actor that I've seen before include "Stage-player" , "Performer in drama" , "Croat (anag.)" , "Theatre player" , "One taking part" .)